Fix unit test for 'remove_lvm_physical_volume'

This PR modified the call to no longer use 'Popen', but it was
missing the corresponding fix in the unit test for said function.

tests/contrib/storage/test_linux_storage_lvm.py

@@ -80,9 +80,9 @@ def test_deactivate_lvm_volume_groups(self, ls_vg):
 
     def test_remove_lvm_physical_volume(self):
         """It removes LVM physical volume signatures from block device"""
-        with patch(STORAGE_LINUX_LVM + '.Popen') as popen:
+        with patch(STORAGE_LINUX_LVM + '.check_call') as popen:
             lvm.remove_lvm_physical_volume('/dev/foo')
-            popen.assert_called_with(['pvremove', '-ff', '/dev/foo'], stdin=-1)
+            popen.assert_called_with(['pvremove', '-ff', '--yes', '/dev/foo'])
 
     def test_is_physical_volume(self):
         """It properly reports block dev is an LVM PV"""